I'd think that the dollies should affect the sound, as they would move the drivers 3+ inches higher from the floor and therefore affect the blend of drivers at the listening position. You might check the owner's manual to see what the manufacturer feels is the best height for listening to the speakers (some feel the tweeters should be at ear-height, for example). I would second the furniture slides--I used them under my Duntechs for years.
Mounting Speakers On A Furniture Dolly For Mobility
Will mounting 125 pound speakers on a furniture dolly with 3 inch wheels degrade the sound? Thick carpeted floor.
I need to move them quite often.
